Malicious PDF — malware analysis report

Static analysis result for SHA-256 446da101dc5fb9fa…

MALICIOUS

PDF

88.8 KB Created: 2021-09-07 01:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7ccaddff265a27d400fc030058dcc920 SHA-1: d06e57a370988fc981c772893d895a53646743cb SHA-256: 446da101dc5fb9fa33aed8d94d1d87ee8db7c26253d5232f06ae25ce6cebd469
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://atya.eu/files/file/27693884723.pdf In PDF document text
    • http://scholl2021.com/clients/1/19/19bca4f76d5065ca3bffbfc1c67e7925/File/72534442616.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/runepafidazado.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/85806854587.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e7a2d245ba8c35ecc740735892088214/tejaputanezagebowasaz.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///24130508123.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a25e6fc12---39162970418.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/25849673032.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/rh5cqj3ctsjvkjo7rue2qtlqt3/jiwerowuwamo.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/6207814599.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/1206201300.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/gutobidibibopuserifije.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/pogukesuzupekepuwunos.pdfIn PDF document text
    • https://tch.lu/files/files/81571982205.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/161368f2d6da74---xedokuwudix.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/30822653069.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/30711814271.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/76001690170.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/46348599123.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610731484823f---tuziruvebagutel.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072d29840d46---64387046125.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/85601915410.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/7a8f98361fc1274298101d46d5d46e16/50329468051.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3ad494fa9---dekuwozi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/182e81b9350b08931398273b89684cde/29660956351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=orthodontic+treatment+of+impacted+teeth+3rd+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF494 18204 bytes
SHA-256: c6c14a915b8f87e2efb23e7451b28ce61cc31081e0ae5df49cfa7b5d606b4841
font_01_sfnt_off0001241e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241E 10868 bytes
SHA-256: 9ca1b6c221245b7235df303be6fccf307607dc394c36a80b20e40dbc85ded032
font_02_sfnt_off00013d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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